EP3412928B1 - Dispositif d'amortissment traction, en particulier pour une bicyclette - Google Patents

Dispositif d'amortissment traction, en particulier pour une bicyclette Download PDF

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Publication number
EP3412928B1
EP3412928B1 EP18172888.2A EP18172888A EP3412928B1 EP 3412928 B1 EP3412928 B1 EP 3412928B1 EP 18172888 A EP18172888 A EP 18172888A EP 3412928 B1 EP3412928 B1 EP 3412928B1
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EP
European Patent Office
Prior art keywords
piston
spring
damping
chamber
shock device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18172888.2A
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German (de)
English (en)
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EP3412928A1 (fr
Inventor
Martin Walthert
Karsten Richter
Samuel Zbinden
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DT Swiss AG
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DT Swiss AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for front wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/10—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for rear wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/064—Units characterised by the location or shape of the expansion chamber
    • F16F9/065—Expansion chamber provided on the upper or lower end of a damper, separately there from or laterally on the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/066—Units characterised by the partition, baffle or like element
    • F16F9/067—Partitions of the piston type, e.g. sliding pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/446—Adjustment of valve bias or pre-stress
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/516—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics resulting in the damping effects during contraction being different from the damping effects during extension, i.e. responsive to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K2025/044—Suspensions with automatic adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K2025/048—Axle suspensions for mounting axles resiliently on cycle frame or fork with suspension manual adjustment details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/06—Stiffness
    • F16F2228/066—Variable stiffness

Definitions

  • the present invention relates to a shock device and in particular a shock absorber for an at least partially muscle-powered two-wheeler and in particular a bicycle and comprises at least one damping system with a damper cylinder and a movable piston arranged therein, which is connected to a piston rod which is led out of the damper cylinder.
  • the invention particularly preferably relates to a suspension fork for an at least partially muscle-powered two-wheeler and in particular a bicycle.
  • Mountain bikes are often equipped with a suspension fork and a rear wheel shock absorber.
  • the shock absorbers on the front and rear wheels dampen shocks when driving downhill, increasing comfort. Furthermore, driving safety can also be increased since the wheels of the bicycle have better traction.
  • a shock absorber for bicycles has become known in which a piston separates two chambers filled with the damping fluid from one another in a damper chamber.
  • the volume of the damping fluid displaced when the piston rod is immersed is passed to an external compensation chamber, where a separating piston separates the working fluid from a gas chamber.
  • the damper chamber is surrounded by a cylindrical cavity and a plurality of bypass bores are provided over the length of the damper chamber, which connect the damper chamber to the cylindrical cavity.
  • the damping force becomes greater and greater as the spring travel is used, since the number of bypass connections decreases. It also realizes a stronger end position damping.
  • This well-known shock absorber works, but includes a heavy steel spring and has a complex structure that still requires a cylindrical cavity around the damper chamber with a large number of bypass holes.
  • the piston in the compression stage acts on a first damping chamber in the damper cylinder when the piston rod is immersed from a further or maximally immersed and, for example, neutral basic position into a further or maximally immersed position and, for example, end position.
  • the damping system is designed such that damping fluid is transferred from the first damping chamber to an additional chamber when the piston rod is immersed. The entire damping fluid or only a part of the damping fluid can be transferred.
  • a flow resistance for transferring the damping fluid into the additional chamber is designed to be path-dependent and depends (directly or indirectly) on a piston position.
  • the flow resistance (for transferring the damping fluid into the additional chamber) is smaller in a first path section of the piston enclosing the basic position than in at least one further immersed second path section.
  • a transition section is provided between the first path section and the second path section.
  • the additional chamber forms a compensation volume for a volume of the piston rod.
  • a separating piston preloaded by a pretensioning device is provided on the additional chamber.
  • a position of the separating piston depends on a piston position.
  • At least a first and at least a second channel lead into the additional chamber in order to introduce damping fluid into the additional chamber.
  • the second channel is at least partially closed by the separating piston when the piston is in the transition section.
  • the basic position can be a starting position or, for example, a position that results in the unloaded state of a two-wheeler equipped with such a pushing device. It is also preferred that the basic position specifies the SAG position that is established when the driver sits down on a two-wheeler equipped with it. Due to the dead weight and the weight of the driver, the shock devices such as the suspension fork and rear wheel shock absorber deflect to a certain extent, which defines the SAG position. This position also represents a basic or starting position that arises at the start of a journey.
  • the impact device according to the invention has many advantages.
  • a considerable advantage of the impact device according to the invention is that a path-dependent damping is provided, the flow resistance and thus the damping being smaller in a first path section including the basic position than in a second path section which is immersed further.
  • a path-dependent damping which is less on a first (small) part of the path than on the following part of the path, offers the advantage that small bumps are softly damped during a fast descent, so that the corresponding bumps do not or only very little on the hands and Arms of the driver transferred.
  • the push device according to the invention offers great comfort.
  • the impact device works over the entire travel, whereby a correspondingly strong compression damping is set.
  • a separating piston preloaded by a pretensioning device and at least partially closing the second channel is provided on the additional chamber enables a simple construction.
  • the construction is inexpensive and allows an inexpensive and light design. It is not necessary to surround the damper chamber with a cylindrical cavity, which enables a kind of bypass for flowing oil or the damping fluid.
  • the shock device is designed as a shock absorber.
  • the term "shock device" can be consistently specified in the present application to the term "shock absorber”.
  • Such a shock absorber can be used in particular for the front wheel or e.g. B. be provided for the rear wheel.
  • a shock absorber for the front wheel is also known as a suspension fork.
  • a shock absorber for the rear wheel can also be referred to as a rear wheel shock absorber.
  • the first path section preferably extends over a length that is shorter than half the maximum piston stroke.
  • the first path section can extend from the beginning of the piston stroke (fully extended state).
  • the first section of the path can also, for. B. only at the basic position such as the unloaded position or the SAG position. This means that there can be another "original" section before the first section.
  • the original path section and the first path section end before half of the maximum piston stroke. If present, the original path section is preferably very short and in particular shorter than 20% or preferably 10% of the first path section.
  • the flow resistance for transferring the damping fluid into the additional chamber is increased at the end of the first path section. That means that preferably at Half (or, for example, 40% or 60%) of the maximum piston stroke, the flow resistance for transferring the damping fluid into the additional chamber is significantly greater than in the basic position.
  • the flow resistance for transferring the damping fluid into the additional chamber is preferably greater in a middle path section between the first path section and an end section than in the first path section.
  • an (even) stronger end position damping is provided in an end section. If a stronger end position damping is provided, the damping is smaller depending on the path in the first path section than in the second path section and in the second path section the damping is again smaller depending on the path than in the end section.
  • the damping can be the same as in the first path section or else.
  • a stronger end position cushioning can be provided in order to form or strengthen a puncture protection.
  • the flow resistance in the first path section preferably remains essentially and in particular (practically) unchanged.
  • Essentially unchanged means that the change in the flow resistance as a function of the position in the first path section is preferably less than 10%.
  • the flow resistance is influenced by a change in the effective flow cross section.
  • a change in the flow cross-section enables an effective influencing of the flow resistance and thus the compression damping.
  • the transition section in which the flow cross section is reduced, preferably adjoins (directly) the first path section. This increases the flow resistance accordingly.
  • the flow cross section can be reduced continuously or in several stages over the length of the transition section.
  • the transition section is preferably shorter than 25% or 20% of the maximum piston stroke.
  • the second path section adjoins (directly) the transition section and extends over a length of between 40% and 60% of the maximum piston stroke.
  • the piston in the damper cylinder variably divides a damping volume into the first damping chamber and a second damping chamber.
  • the piston is equipped with at least one throttle unit in order to allow damping fluid to flow through the piston in the compression stage and / or the rebound stage.
  • the additional chamber forms a compensation volume for a volume of the piston rod.
  • a separating piston preloaded by a pretensioning device is provided on the additional chamber.
  • a position of the separating piston is dependent on a piston position. There is particularly preferably a clear assignment of a position of the piston to a position of the separating piston. This means that a position of the piston clearly defines a position of the separating piston (and vice versa).
  • the additional chamber may form the second damping chamber and for the damping fluid to be transferred from the first damping chamber to the additional chamber when the pipe system is compressed or compressed. Accordingly, the damping fluid is transferred from the additional chamber to the first damping chamber when the pipe system rebounds.
  • At least the first channel and at least the second channel lead into the additional chamber. It is possible to introduce damping fluid into the additional chamber via the first channel and the second channel.
  • the second channel is at least partially closed by the separating piston when the piston is in the transition section located.
  • the second channel is preferably open when the piston is in the first path section.
  • the second channel is preferably (essentially completely or completely) closed when the piston and / or the separating piston are in the second path section.
  • the second channel can be closed by closing an (e.g. lateral) inlet and / or an outlet from the second channel.
  • the second channel can also remain open on one side when closed (at one end).
  • the separating piston prefferably closes a cross-sectional portion of the first channel when the piston is in the transition section.
  • the second channel is preferably closed (practically completely or almost completely or completely) when the piston is in a second path section which adjoins the transition section.
  • a “closed channel” is understood to mean a channel which is closed to such an extent that a free flow cross section of less than 30% and in particular less than 10% and preferably less than 5% of the maximum free flow cross section remains .
  • the first path section and the transition section preferably extend over less than half the piston stroke and thus over less than half the maximum path length.
  • the second channel is particularly preferably closed by the separating piston, the position of which depends on a position of the piston.
  • the second channel is particularly preferably or is completely closed when the separating piston is located in a second path section of the separating piston which adjoins the transition section of the separating piston.
  • the first path section and the transition section extend over less than 45% of the maximum piston stroke and in particular over less than 40% of the piston stroke.
  • Such a configuration sets a significantly lower damping in the first third of the spring travel, while the damping is also significantly increased in the low-speed range via the subsequent spring travel.
  • a shock device can thus softly dampen small and medium-sized impacts over the first section of the path, while strong impacts are also adequately hard-damped there.
  • the first channel and the second channel are flow channels of a throttle device for the pressure stage and in particular the low-speed pressure stage.
  • the first channel and the second channel thus preferably serve to dampen small and medium-sized impacts.
  • the flow resistance of the throttle device for the pressure stage and in particular the low-speed pressure stage can preferably be set from the outside via at least one operating element.
  • a flow resistance can be influenced in at least one valve upstream of the two channels. This then generally increases or decreases the flow resistance, while the path-dependent damping properties are maintained accordingly.
  • a transition position of the transition section is preferably adjustable.
  • a position of the element closing the second channel can be adjusted in the longitudinal direction by means of a screwing operation or another adjustment operation in order to set the transition position.
  • a length of the transition section is also adjustable and / or adjustable. Such an adjustment process can also be carried out, for example, by angular adjustment of a component. It is also possible that a length of the Transitional section is adjustable.
  • At least one additional throttle device is provided or included for the high-speed pressure stage.
  • Such an additional throttle device can be provided, for example, by a valve which is preloaded into the closed position by means of a corresponding spring, so that the responsive valve only opens when the force exceeds the spring force.
  • the separating piston is pretensioned via a spring unit such as a steel spring and / or a gas spring.
  • a spring unit such as a steel spring and / or a gas spring.
  • Such or another spring unit enables automatic return to the unloaded state.
  • a device for stronger end stop damping is preferably provided.
  • Such a device can consist of an elastic material.
  • An additional cross-sectional constriction or an increase in the flow resistance is also possible.
  • a flow cross-section at the end of the piston stroke can also be reduced in order to provide greater end position damping. Then the damping (for the compression stage) is reduced in an area at the beginning of the piston stroke compared to a central area and increased at the end compared to the central area.
  • the basic position corresponds to a starting position with the piston rod maximally immersed or e.g. the SAG position or e.g. a position in between or next to it.
  • the impact device preferably comprises at least one pipe system consisting of a standpipe and a dip pipe interacting therewith and a wheel receiving space next to it.
  • the damping system is arranged in the pipe system.
  • the impact device can be a seat for a saddle device include or be designed as a rear wheel damper.
  • the shock device is preferably designed as a shock absorber and in particular as a suspension fork.
  • the suspension fork can be operated with very low compression damping in the first third or for the first 40% of the travel at a fast driving speed on a descent or a fast sedentary ride and with the front wheel largely relieved of pressure, with which small and medium-sized obstacles from the suspension fork are easy be balanced.
  • This enables a very comfortable functioning.
  • the suspension fork works over the entire travel, whereby a strong compression damping is desired and is provided so that the suspension fork does not sag.
  • the invention avoids the disadvantage that even quick and small impacts cause strong damping, which would provide an uncomfortable suspension fork and / or an uncomfortable rear wheel damper.
  • FIG. 1 shows a schematic representation of a mountain bike as a bicycle or two-wheeler 300.
  • the bicycle can have an electrical auxiliary drive.
  • the bicycle has a front wheel 301, a rear wheel 302, a frame 303, two shock devices 1 as shock absorbers, namely a suspension fork 304 and a rear wheel damper 305, a handlebar 306 and a saddle 307.
  • Pedals and here a derailleur are provided as drive 312.
  • Disc brakes 311 can be provided.
  • the front wheel 301 and the rear wheel 302 are each fastened to the fork 304 and the frame 303 via a quick release device.
  • the wheels each have spokes 309 and a rim 310 and a hub 308.
  • the mountain bike 300 comprises two shock absorbers 1, namely the suspension fork 304 and the rear wheel shock absorber 305.
  • FIG 2 shows the suspension fork 304 of the mountain bike 300 Figure 1 in a front view.
  • the suspension fork 304 includes a fork shaft 315 which is connected to the upper unit 318.
  • the upper unit 318 further comprises the fork crown 314 and the standpipes 161 and 261.
  • the upper unit 318 interacts with the lower unit 317, which includes the dip tubes 162 and 262.
  • a dropout 316 is provided at each of the lower ends 162b, 262b of the dip tubes 162 and 262.
  • the fork crown 314 is provided at the upper ends 161a and 261a of the standpipes 161 and 261 (cf. Fig. 7 ).
  • the upper ends 162a and 262a of the dip tubes 162 and 262 engage around the lower ends 161b and 261b of the standpipes 161 and 261.
  • the wheel receiving space 65 is formed between the tube systems 160 and 260.
  • the suspension fork 304 here comprises two pipe systems 60, namely the pipe system 160 in which the damping system 100 is housed and the pipe system 260 in which the spring system 200 is housed.
  • FIG 3 Three representations of the pipe system 160 are shown side by side in schematic cross sections.
  • the pipe system 160 is shown on the left in the basic position 111 or an initial position, while in the middle the pipe system 160 is shown in a transition position 112 and on the right in a further immersed position 113.
  • the fork crown 314 can be seen in each case at the upper end of the pipe system 160.
  • the pipe system 160 comprises a standpipe 161 and the dip pipe 162, not shown here, which surrounds the piston rod 105 in the assembled state.
  • a damper cylinder 103 is firmly accommodated in the interior of the standpipe 161.
  • the piston or damper piston 110 variably divides the damping volume 104 into a first damping chamber 106 and a second damping chamber 107.
  • a throttle unit 132 is arranged in the piston 110 and dampens the passage of the damping fluid 109 from the first damping chamber 106 into the second damping chamber 107 and vice versa.
  • the additional chamber 108 is partitioned off by a separating piston 120 and provides an equalizing volume 134.
  • the separating piston 120 is prestressed by a prestressing device 133.
  • Position shown on the left is the suspension fork 304 or the damping system 100 in the basic position 111, which can be maximally rebounded or z.
  • B. corresponds to the SAG position, which is reached after the driver sits on the bike at a standstill.
  • a lower connection 166 is formed, which is connected to the in Figure 3 dip tube, not shown, is connected.
  • a cavity 167 (which is regularly filled with air) is formed radially between the outer wall of the damper cylinder 103 and the inner wall of the standpipe 161.
  • the damper cylinder 103 there is a cavity 169 in which the prestressing device 133 is arranged, which prestresses the separating piston 120.
  • Coil spring 133 as a biasing device. It is also possible that the cavity 169 serves as an (additional or only) air spring and thus as a pretensioning device 133 in order to pretension the separating piston 120.
  • the pipe system 160 of the suspension fork 304 is shown in the transition position 112.
  • the piston 110 is further immersed in the damper cylinder 103.
  • the separating piston 120 has shifted from the basic position 121 to the transition position 122.
  • the separating piston has covered a first path section 124, while the piston 110 has covered a first path section 114.
  • the path sections 114 and 124 are proportional to one another.
  • the piston 110 reaches the transition section 115 and the separating piston 120 reaches the transition section 125, in which the separating piston 120 begins to close an opening 138 (or many openings 138 distributed around the circumference).
  • the damper cylinder 103 comprises a damping volume 104, which is formed by the first damping chamber 106 and the second damping chamber 107.
  • FIG Figure 3 Position shown on the right, in which the pipe system 160 and thus the piston 110 are in a further immersed position 113.
  • This submerged position 113 is located in the second path section 116 between the transition section and the end position.
  • the second path section 116 preferably extends over more than half of the piston stroke 119.
  • the length of the first path section 114 to the piston stroke 119 is preferably between one fifth and two fifths. In preferred configurations, the portion of the first path segment in the piston stroke 119 is approximately one third (+/- 10%).
  • the length of the first path section 114 can be up to half or even 60% of the piston stroke 119 (or more).
  • the second section is shortened then correspondingly to 30% or 40% and the transition section extends over the remainder in between.
  • the piston 110 is located in the right illustration in FIG Figure 3 in the immersed position 113. Accordingly, the separating piston 120 has assumed an immersed position 123 and is located in the second path section 126. The separating piston 120 can cover a piston stroke 129.
  • Figure 4 shows an enlarged detail from the left representation of Figure 3 .
  • the upper part of the pipe system 160 is shown, the fork crown 314 being recognizable in section at the upper end.
  • the damping can be adjusted via the control element 168.
  • the pretensioning device 133 is arranged above the damper cylinder 103, which can comprise a steel spring 135 and / or a gas spring 136 in order to preload the separating piston 120 upwards.
  • the separating piston separates the additional chamber 108.
  • the separating piston 120 has a low-friction bushing 120a on the outer circumference. While in a central region of the separating piston, the preloading device 133 presses the separating piston 120 upward, part 108a of the additional chamber 108 is located radially outside of the separating piston 120 and another part above the separating piston 120.
  • the damper cylinder 103 is installed in the standpipe 161 in such a way that there is a radial empty space or cavity 167.
  • an insert 118 is placed on the upper end of the damper cylinder 103.
  • the lower end 118a of the insert 118 can, for example, be screwed to the end of the damper cylinder 103.
  • the insert 118 is sealed off from the inner surface of the standpipe 161 via at least one seal 174.
  • Above the seal 174, which is shown in the illustration Figure 4 is located approximately at the height of the seal 175 of the separating piston 120, a radial gap 154 is formed between the insert 118 and the wall of the standpipe 161, which is used to transport damping fluid into the additional chamber 108.
  • At least two radial holes (rows of holes or series of holes) or openings 138 and 139 are formed in the insert 118.
  • the openings 138 and 139 are arranged offset in the axial direction of the insert 118.
  • the openings 138 a plurality of which are arranged distributed around the circumference of the insert 118, between the lower end 120b of the low-friction bushing 120a and the seal 175 at the lower end 120c of the separating piston 120.
  • Above the openings 139 the space between the insert 118 and the inner wall of the standpipe 161 forms a (first) channel 141.
  • a (second) channel 142 is formed below the openings 138 up to the openings 139 in the space between the insert 118 and the inner wall of the standpipe 161.
  • the openings 139 are formed above the upper end of the separating piston 120 in the radial wall of the insert 118.
  • the openings 138 form a valve 137 for the passage of the damping fluid 109 from the channel 142 into the additional chamber 108.
  • the opening 139 also forms a valve for the passage of the damping fluid 109 from the channel 141 into the additional chamber 108 .
  • a control insert 146 is inserted into the insert 118 at the upper end 118b of the insert 118, so that the lower end 118a of the insert is connected to the damper cylinder 103 and the upper end 118b of the insert 118 is connected to the control insert 146.
  • the radial cavity 167 between the damper cylinder 103 and the standpipe 161 is connected via openings 170 to the cavity 169, in which the prestressing device 133 for the separating piston 120 is accommodated. It is also possible to use a gas spring 136 to preload the separating piston 120. Then the openings 170 are regularly closed or not available.
  • damping fluid 109 flows up through the central channel along the flow path 150 into the control insert 146.
  • the throttle device 140 opens for low-speed and the damping fluid can flow into the in Figure 4 illustrated spring-loaded position along the flow path 151 into the radial gap 154 between the insert 118 and the inner wall of the standpipe 161.
  • the damping fluid in the in Figure 4 further illustrated extended position 111 (eg the basic position 111) enter the additional chamber 108 through the openings 138 and 139.
  • the openings 138 and 139 provide a large flow cross section overall, so that the compression process in the compression stage is only slightly damped in the illustrated basic position 111.
  • the flow path 151 through the openings 139 is shown with a solid arrow.
  • the flow path 153 through the openings 138 is shown with a dash-dotted arrow 153.
  • the flow path initially runs along the flow path 151 into the radial gap 154. A portion of the damping fluid 109 passes directly through the openings 139 into the additional chamber 108.
  • Another part flows along the radial gap 154 through the second channel 142 to the openings 138, which here lead to the partial chamber 108a of the additional chamber 108.
  • the damping fluid 109 that has entered the sub-chamber 108 a can then be directed upward through the return channel 143 radially inward from the bush 120 a into the main part of the additional chamber 108.
  • the flow path 152 is additionally opened for high speeds (high-speed) by the throttle device 145.
  • the flow path 152 is shown with a dashed arrow.
  • the shim valve 173 opens, so that the flow path 152 for an effective transfer of damping fluid 109 into the additional chamber 108 is available.
  • the preloaded one-way valve 171 allows the damping fluid 109 (in particular oil) to flow back in the rebound stage.
  • FIG. 5 shows an enlarged area of the standpipe 161 of the suspension fork 304 in a transition position 112, in which the suspension fork is further compressed.
  • the total piston stroke 119 is approximately 160 mm.
  • the length of the first path section 114 is 50 mm without the transition section.
  • the transition section 115 begins at 50 mm and ends at 70 mm.
  • the transition section 115 and / or 125 is in particular shorter than 25% or 20% of the maximum piston stroke 119.
  • the second path section 114 adjoins the transition section 115 and extends over a length of between 40% and 60% of the maximum piston stroke.
  • FIG. 5 a variant is shown for clarification, in which no openings 170 may be provided at the lower end of the insert 118.
  • Such a variant can be operated without a steel spring 135 and only with a gas spring 136.
  • Figure 6 finally shows a detail similar to that Figures 4 and 5 , wherein the suspension fork or the piston 110 are in the second path section 116 and are thus further compressed.
  • this second path section 116 there is the separating piston 120 or the bushing 120a in the second path section 126 and the bushing 120 completely closes the openings 138.
  • the flow path 152 also opens in the event of stronger impacts.
  • FIG. 7 shows a schematic cross section through the pipe system 260.
  • the pipe system 260 comprises a pipe 261 as a standpipe and a pipe 262 as a dip pipe.
  • the tubes 261 and 262 telescope with one another and extend from a first and here upper end 263 to a second and here lower end 264. Adjustment elements for the spring properties can be provided at the upper and / or at the lower end.
  • an air valve 218 is provided for filling the positive air spring 201.
  • the volume 204 of the standpipe 261 is separated by the suspension piston or piston 210 into a positive air spring 201 and a negative spring 202.
  • the positive air spring 201 comprises a volume 201a
  • the negative spring 202 comprises a volume 202a.
  • the piston rod 205 extends down through the lower end of the standpipe 261 and is connected to the dip tube 262 at the lower end 264.
  • the positive air spring 201 has a positive chamber 206 and preloads the spring system 200 into the extended position 211 shown here.
  • the negative spring 202 has a negative chamber 202 and counteracts the force of the positive air spring 201. The characteristic curve of the spring system 200 is thereby improved.
  • Such spring systems 200 in which a positive air spring and optionally also an air spring are used as negative spring 202, enable spring forks with a particularly low weight.
  • Another advantage of using such gas springs is that an adaptation to the driver's weight can be achieved by adapting the internal pressure. While when using steel springs the effective steel spring has to be replaced with a (correspondingly strong) different driver's weight, the pressure can be easily adjusted when using gas springs.
  • the suspension fork 304 solves this problem in that a supplementary spring 208 is installed at the lower end of the piston rod 205.
  • the supplementary spring 208 has a spring element 209, which is designed in particular as a helical spring. In principle, such a coil spring has practically no friction. The response of the supplementary spring 208 is much softer than that of the positive air spring 201.
  • the positive air spring 201 and the supplementary spring 208 are connected in series, so that with a small impact the spring acts first, which has to overcome a smaller friction. This is the supplementary spring 208 (unless it is fully compressed).
  • the maximum force of the supplementary spring 208 is considerably less than the maximum force of the positive air spring 201.
  • a ratio of the spring force of the supplementary spring 208 to a spring force of the positive air spring 201 at maximum stroke of the supplementary spring 208 is less than 20:10 and greater than 1:10.
  • the spring travel of the supplementary spring 208 is also considerably less than the spring travel of the positive air spring 201.
  • the ratio of the spring travel of the positive air spring 201 to the spring travel of the supplementary spring in the fully rebounded state is greater than 4: 1.
  • the supplementary spring 208 has a spring travel of 6 mm, 8 mm, 10 mm or 12 mm or 14 mm.
  • the total spring travel of the spring system 200 is preferably at least 100 mm and can be 120 mm, 140 mm or 160 mm or 180 mm or values in between or more. This results in a ratio of the spring travel of the positive air spring and the supplementary spring 208 of greater than ten and the ratio can reach or exceed a value of 15 or 20.
  • the range of the ratio of the spring travel of the positive air spring and the supplementary spring 208 is preferably between 5 and 30.
  • the supplementary spring 208 is already fully compressed in the SAG position.
  • the SAG position can be set via the air pressure for the driver and is usually set at 20% or 25% or 30% of the travel. This means that a suspension fork in a static starting position, in which the rider sits quietly on the stationary bike, is already deflected by about 40 mm with a sag of 25% and with a travel of 160 mm.
  • Figure 7 a position in which the supplementary spring 208 is not yet fully compressed. Such a position can also arise if, after a deflection, the positive air spring 201 and the supplementary spring 208 first both rebound.
  • a ratio of the stroke of the positive air spring to a spring travel of the supplementary spring is in particular greater than a ratio of the volume of the positive chamber to a volume of the negative chamber in the extended position 211.
  • a ratio of the volume of the positive chamber 206 to a volume of the negative chamber in the extended position 211 especially greater than 1.6.
  • the area of the supplementary spring 208 Figure 7 is in Figure 8 shown enlarged. It can be seen that the supplementary spring 208 is accommodated in a guide housing 221.
  • the guide housing 221 consists of an upper housing part 228 and a lower housing part 223. Holes 227 are preferably provided in the guide housing 221 in order to enable fluid exchange with the interior of the dip tube 262.
  • the lower housing part 223 has a tool connection and here, for example, a hexagon socket 224.
  • the lower housing part 223 can thus be screwed onto the lower end 262b of the dip tube 262.
  • the supplementary spring 208 can be exchanged for a stronger or weaker copy.
  • the spring element 209 of the supplementary spring 208 is accommodated in the interior of the guide housing 221.
  • the spring element 209 is designed as a helical spring and acts between the lower support surface of the lower housing part 223 and the upper support unit 222, which is connected to the lower end of the piston rod 205 and screwed, for example.
  • an end stop damper 220 can be provided, which is designed, for example, as an elastic ring or rubber ring or the like. It is possible to use an O-ring or a quad ring or another suitable elastic ring.
  • the end stop cushioning 220 provides a smooth transition when the supplementary spring 208 reaches the end of its travel.
  • the supplementary spring 208 preferably has a spring force that is in a range between a quarter of the spring force of the positive air spring 201 in the extended position 211 and four times the spring force of the positive air spring 201 in the extended position 211.
  • the ratio of the spring force is between 2: 1 and 1: 2 and can be approximately 1: 1 in concrete versions.
  • the spring force of the supplementary spring is as low as possible in the fully rebounded state in order to enable a very smooth response.
  • the supplementary spring 208 has a particularly low breakaway force.
  • the breakaway force of the supplementary spring 208 is in particular less than that of the rest of the spring system and particularly preferably less than the breakaway force of the positive air spring 201.
  • the breakaway force of the supplementary spring 208 is particularly preferably zero.
  • the breakaway force is to be distinguished from the effective force of the corresponding spring and spring system during operation.
  • the impact device In normal operation (or when a rider is sitting on the bike) and the impact device in an intermediate position and z. B. is in the SAG position, the external forces and the forces of the spring system are in equilibrium in the static case. Since the breakaway force of the supplementary spring 208 is very small, every small or smallest impact causes a corresponding spring movement of the spring system 200, provided that the supplementary spring 208 is not on the block.
  • the spring constant of the supplementary spring 208 is approximately 20 N / mm or 28 / mm and the possible stroke is 8 mm or 10 mm.
  • the supplementary spring 208 enables a finer response behavior of the suspension fork 304 and contributes to a linearization of the characteristic curve of the suspension fork 304. Even if the supplementary spring 208 softly compresses, the damping system 100 is effective, so that even with spring movements only the supplementary spring 208 these movements are dampened by the damping system 100.
  • a zero crossing of the spring characteristic is achieved because the supplementary spring has no breakaway force. Impacts on the driver's wrist when hitting the ground caused by the breakaway force no longer occur.
  • Figures 9 and 10 show the area of the supplementary spring 208, wherein in Figure 9 the supplementary spring in a transition position 212 and in Figure 10 is in the end position 213.
  • the stroke 219 of the supplementary spring 208 is in Figure 10 completely exhausted.
  • the stroke 219 of the supplementary spring 208 is in particular smaller than the diameter 261c and 262c of the tubes 261 and 262.
  • the inner diameter 261c of the tube 261 here is preferably between 15 and 50 mm and can be, for example, 24.6 mm.
  • the outer diameter 262c of the tube 262 is preferably between 20 and 60 mm and can be, for example, 31.4 mm.
  • the overall stroke of the spring system is a multiple (> 3 or> 4 or> 5 or> 10 and here> 15) of the stroke 219.
  • the stroke 219 preferably corresponds at least substantially to the piston stroke 119 and is z. B. about 160 mm. Because of z. B. manufacturing conditions, the stroke 219 and the piston stroke 119 may be slightly different, but are preferably (at least almost) identical.
  • a better response can be achieved via the supplementary spring 208 at the beginning of the compression or when the supplementary spring 208 is not on the block.
  • the spring force and the stroke 219 of the supplementary spring 208 can be dimensioned such that there is still considerable stroke available for the supplementary spring 208 even in the SAG position, so that the supplementary spring 208 is in the SAG position, for example, in the position shown in FIG Figure 9 position shown.
  • the supplementary spring 208 is already fully compressed in the SAG position in the static idle state. In real driving, the shock device rebounds after a shock.
  • the supplementary spring 208 also so that the supplementary spring 208 can deflect if it has (briefly) previously extended.
  • Figure 11 shows another embodiment of a spring system 200.
  • the spring system 200 is in turn arranged in the standpipe 261 of the pipe system 260.
  • the spring system 200 according to Figure 11 as well as the spring system 200 according to FIG Figure 7 have a mechanical supplementary spring 208 at the lower end of the piston rod 205.
  • the corresponding lower area of the piston rod is preferably analogous to that Figures 7 to 10 designed.
  • the spring system 200 here comprises a positive air spring 201 with a positive chamber 206 above the piston 210.
  • the negative spring 202 with a negative chamber 207 is arranged between the lower end of the piston 210 and the lower end of the standpipe 261.
  • the piston 210 runs within a cylinder device 203 which is inserted into the interior of the standpipe 261.
  • the cylinder device 203 is here open at the top, so that the cavity 231 surrounding the cylinder device 203 between the cylinder device and the inner wall of the standpipe 261 provides an additional cavity 231, which contributes to the volume of the positive air spring 201.
  • a seal 239 is provided in the cavity between the cylinder device 203 and the standpipe 261. The seal 239 separates the upper area with the additional cavity 231 from a lower area with a further cavity 232.
  • the additional cavity 231 is connected to the positive chamber 206, the further cavity 232 is connected to the negative chamber 207 via flow openings 234.
  • the additional cavity 231 is connected to the positive chamber 206 via the annular gap as a flow opening 233.
  • the additional cavity 231 and the further cavity 232 increase the volume 201a available to the positive air spring 201 and the volume 202a available to the negative spring 202 by the additional cavity 231 and the further cavity 232, respectively. Conversely, the area on which the piston 210 acts during compression and rebound is reduced.
  • the enlarged volume 201a of the positive air spring 201 and the enlarged volume 202a of the negative spring 202 result in less progression being achieved during the compression and rebound. This linearises the characteristic of the suspension fork. Compared to a conventional spring system with the same external dimensions, the ratio of the volume 201a to the piston diameter 210a is increased. Both mean that both the progression of the positive air spring and the progression of the negative air spring are reduced, so that an overall more linear characteristic can be provided.
  • the negative chamber 207 is connected to the interior of the piston rod 205 via a flow opening 235.
  • the interior of the piston rod 205 then serves as a (further) supplementary cavity 230 for the negative spring.
  • a longitudinal bore can be introduced through the piston 210, which connects the positive chamber 206 to the supplementary cavity 230. The flow opening 235 is then closed accordingly.
  • Reference numeral 238 denotes a connecting element for connecting the piston 210 to the piston rod 205.
  • the bypass 225 which according to the illustration Figure 11 Shown a little above the piston 210, the positive chamber 206 connects to the negative chamber 207 when the piston 210 or the seal of the piston 210 is at the height of the bypass 225. This allows pressure exchange between the positive chamber 206 and the negative chamber 207 in this position. In addition, there is an automatic pressure equalization between the positive chamber 206 and the negative chamber 207 every time the piston 210 is in a corresponding position.
  • the dip tube 262 is guided on the standpipe 261 via guide bushes 237.
  • the empty space 236 below the guide bush 237 serves to reduce the friction.
  • Figure 12 shows an enlarged section Figure 11 , in which the opening 234 and the bypass 225 can be seen better.
  • the suspension fork provides an advantageous system in which softer damping and softer suspension are made possible in a first travel range.
  • the damping is changed depending on the path. While the damping is greatly reduced only over a first path component, the damping is reduced to a normal dimension after, for example, a third or 40% of the spring path.
  • the supplementary spring 208 also enables a softer response. This means that small bumps and uneven floors can be better dampened. By increasing the ratio of spring volume to piston area, an even better linearization of the spring characteristic can be achieved.
  • the spring system 200 makes it possible to linearize the typical waveform of an air spring characteristic.
  • the supplementary spring 208 in the piston rod enables the suspension fork to move even before the breakaway force (frictional force) is reached or exceeded. Measurements carried out in a concrete example gave a breakaway force of 20N.
  • an air spring system has no spring characteristic per se (force curve shown over the spring travel) that runs through the zero point of the coordinate system, where the spring travel and the force are each zero. This is due to the breakaway force that has to be overcome in order for a shock device to deflect.
  • a pushing device 1 equipped with a supplementary spring 208 enables the pushing device 1 (for example a suspension fork) to move immediately, even if the positive air spring per se is greater under a force or equal to 28 N (or, depending on the design, e.g. 20 N) begins to move.
  • Supplementary spring 208 makes it possible to spring directly each time the wheel hits the ground. Without such a supplementary spring 208, a shock of 20N could be passed unsprung into the driver's hands. The spring characteristic runs through the zero point.
  • a spring system 200 has a more linear characteristic and has considerable advantages.
  • the spring system 200 offers a smooth response, because less force is required in the first area (or until the curves of the positive air spring and the supplementary spring meet) to drive over an identical obstacle or to travel the same travel.
  • a steel spring is more linear than a conventional air spring system with a positive air spring and a negative air spring.
  • the conventional air spring system With a conventional air spring system with the same increase in force, the conventional air spring system has covered significantly more distance than a linear steel spring.
  • this can cause the suspension fork to submerge in situations where the suspension fork is already slightly compressed, such as when braking on a descent with obstacles on the way. This leaves only relatively little travel, which can give the driver an uneasy feeling because the load is shifted further forward and there is little spare travel left for an unexpected event.
  • the impact device 1 presented here offers more predictable behavior and thus a safer feeling for the driver.
  • the volume of both air chambers (positive air chamber and negative chamber) is preferably increased or relative to the prior art for better linearization of the characteristic of the spring system 200 Volume of the air chambers reduced the diameter of the piston. This results in less progression at both ends of the travel and a typical "wave” or inverted “S-shape" of the air suspension becomes smaller.
  • the supplementary spring 208 is connected in series with the air suspension (positive air spring and negative spring), which acts in a first area of the spring travel.
  • the supplementary spring 208 acts until the force of the supplementary spring 208 on the suspension fork 224 reaches Newton (N).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Claims (15)

  1. Dispositif d'absorption de choc (1) pour un deux roues (300) entraîné au moins partiellement par force musculaire, comprenant un système amortisseur (100) doté d'un vérin d'amortissement (103) et d'un piston (110) qui y est agencé mobile et qui est relié à une tige de piston (105) guidée hors du vérin d'amortissement (103),
    dans lequel, lorsque la tige de piston (105) s'enfonce d'une position de base (111) plus en sortie dans une position (113) de plongée plus enfoncée, le piston (110) exerce une action sur une première chambre d'amortissement (106) dans le vérin d'amortissement (103), dans lequel le système amortisseur (100) est réalisé de telle sorte que lorsque la tige de piston (105) s'enfonce, du fluide d'amortissement (109) est transféré de la première chambre d'amortissement (106) à une chambre supplémentaire (108),
    dans lequel une résistance à l'écoulement au transfert du fluide d'amortissement (109) dans la chambre supplémentaire (108) est réalisée en fonction de la course et dépend d'une position du piston (111-113), et dans lequel la résistance d'écoulement est, dans une première partie de course (114) du piston (110) englobant la position de base (111), inférieure à celle dans au moins une deuxième partie de course (116) plus enfoncée, dans lequel une partie de transition est prévue entre la première partie de course et la deuxième partie de course, dans lequel la chambre supplémentaire (108) forme un volume de compensation (134) pour un volume de la tige de piston (105) et dans lequel un piston séparateur (120) précontraint par un dispositif de précontrainte (133) est prévu au niveau de la chambre supplémentaire (108), dans lequel une position (121-123) du piston séparateur (120) dépend d'une position de piston (110), caractérisé en ce qu'au moins un premier (141) et un deuxième canal (142) passent dans la chambre supplémentaire (108) pour introduire du fluide d'amortissement (109) dans la chambre supplémentaire (108),
    et en ce que le deuxième canal (142) est obstrué au moins partiellement par le piston séparateur (120) lorsque le piston (110) se trouve dans la partie de transition (115).
  2. Dispositif d'absorption de choc (1) selon la revendication précédente, dans lequel la première partie de course (114) s'étend sur une longueur qui est inférieure à 60% ou 1/2 ou 40% de la course maximale du piston (119).
  3. Dispositif d'absorption de choc (1) selon l'une quelconque des revendications précédentes, dans lequel la résistance à l'écoulement reste sensiblement inchangée dans la première partie de course (114).
  4. Dispositif d'absorption de choc (1) selon l'une quelconque des revendications précédentes, dans lequel la résistance à l'écoulement est influencée par un changement dans la section efficace d'écoulement et/ou dans lequel la résistance à l'écoulement est influencée par un changement dans une longueur d'une voie d'écoulement, et/ou la résistance à l'écoulement est influencée par un changement dans une résistance au débit d'une vanne d'écoulement.
  5. Dispositif d'absorption de choc (1) selon la revendication précédente, dans lequel une partie de transition (115) est en prolongement de la première partie de course (114), dans laquelle partie de transition la section d'écoulement est rétrécie, dans lequel notamment la partie de transition (115) est plus courte que 25% ou 20% de la course maximale du piston (119) et dans lequel notamment la deuxième partie de course (114) est en prolongement de la partie de transition (115) et s'étend sur une longueur d'entre 40% à 60% de la course maximale du piston (119).
  6. Dispositif d'absorption de choc (1) selon l'une quelconque des revendications précédentes, dans lequel le piston (110) dans le vérin d'amortissement (103) divise un volume d'amortissement (104) de manière variable dans la première chambre d'amortissement (106) et une deuxième chambre d'amortissement (107) et/ou dans lequel le piston (110) est équipé d'au moins une unité d'étranglement (132).
  7. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, dans lequel le deuxième canal (142) est sensiblement obstrué lorsque le piston (110) se trouve dans une deuxième partie de course (116) qui est dans le prolongement de la partie de transition (115), dans lequel la première partie de course (114) et la partie de transition (115) s'étendent sur moins de la moitié de la course du piston (119).
  8. Dispositif d'absorption de choc (1) selon l'une quelconque des revendications précédentes, dans lequel le premier canal (141) et le deuxième canal (142) sont des canaux d'écoulement d'un dispositif d'étranglement (140) pour le cycle de compression.
  9. Dispositif d'absorption de choc selon la revendication précédente, dans lequel la résistance à l'écoulement du dispositif d'étranglement (140) peut être réglée, pour le cycle de compression, de l'extérieur par au moins un élément de commande (168).
  10. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, dans lequel on peut régler une position transitoire (112) de la partie de transition (115) et/ou dans lequel on peut régler une longueur de la partie de transition (115).
  11. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, dans lequel un dispositif d'étranglement (145) supplémentaire est prévu pour le cycle de compression haute vitesse et/ou dans lequel le piston séparateur (120) est précontraint en tension par le biais d'un ressort en acier (135) et/ou d'un amortisseur à gaz (136).
  12. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, dans lequel un dispositif est prévu pour un amortissement de fin de butée plus fort.
  13. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, dans lequel la position de base (111) est une position de départ (111) où la tige de piston (105) est sortie au maximum, ou la position sag.
  14. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, comprenant au moins un système de tuyaux (160), composé d'un tube montant (161) et d'un tube plongeur (162) coopérant avec celui-ci, et un espace de logement de roue (65) à côté, dans lequel le système amortisseur (100) est agencé dans le système de tuyaux (160).
  15. Dispositif d'absorption de choc selon l'une quelconque des revendications précédentes, comprenant un logement pour un dispositif de selle (307) ou réalisé sous forme d'amortisseur de roue arrière (305) ou de fourche de suspension (304).
EP18172888.2A 2017-05-18 2018-05-17 Dispositif d'amortissment traction, en particulier pour une bicyclette Active EP3412928B1 (fr)

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DE102017110889.0A DE102017110889A1 (de) 2017-05-18 2017-05-18 Stoßeinrichtung insbesondere für ein Fahrrad

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EP3412928B1 true EP3412928B1 (fr) 2020-04-08

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DE202022104530U1 (de) 2022-08-09 2022-09-07 Dah Ken Industrial Co., Ltd. Automatische Stoßdämpfungsvorrichtung für Fahrräder

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DE102017110889A1 (de) 2018-11-22
US20180334220A1 (en) 2018-11-22
US10668975B2 (en) 2020-06-02
EP3412928A1 (fr) 2018-12-12

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